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Random

Package random implements some basic functions to generate random int and string.

Source:

Usage:

import (
    "github.com/duke-git/lancet/v2/random"
)

Index

Documentation

RandBytes

Generate random byte slice.

Signature:

func RandBytes(length int) []byte

Example:Run

package main

import (
    "fmt"
    "github.com/duke-git/lancet/v2/random"
)

func main() {
    randBytes := random.RandBytes(4)
    fmt.Println(randBytes)
}

RandInt

Generate random int between min and max, may contain min, not max.

Signature:

func RandInt(min, max int) int

Example:Run

package main

import (
    "fmt"
    "github.com/duke-git/lancet/v2/random"
)

func main() {
    rInt := random.RandInt(1, 10)
    fmt.Println(rInt)
}

RandString

Generate random given length string. only contains letter (a-zA-Z)

Signature:

func RandString(length int) string

Example:Run

package main

import (
    "fmt"
    "github.com/duke-git/lancet/v2/random"
)

func main() {
    randStr := random.RandString(6)
    fmt.Println(randStr) //pGWsze
}

RandUpper

Generate a random upper case string

Signature:

func RandUpper(length int) string

Example:Run

package main

import (
    "fmt"
    "github.com/duke-git/lancet/v2/random"
)

func main() {
    randStr := random.RandString(6)
    fmt.Println(randStr) //PACWGF
}

RandLower

Generate a random lower case string

Signature:

func RandLower(length int) string

Example:Run

package main

import (
    "fmt"
    "github.com/duke-git/lancet/v2/random"
)

func main() {
    randStr := random.RandLower(6)
    fmt.Println(randStr) //siqbew
}

RandNumeral

Generate a random numeral string

Signature:

func RandNumeral(length int) string

Example:Run

package main

import (
    "fmt"
    "github.com/duke-git/lancet/v2/random"
)

func main() {
    randStr := random.RandNumeral(6)
    fmt.Println(randStr) //035172
}

RandNumeralOrLetter

generate a random numeral or letter string

Signature:

func RandNumeralOrLetter(length int) string

Example:Run

package main

import (
    "fmt"
    "github.com/duke-git/lancet/v2/random"
)

func main() {
    randStr := random.RandNumeralOrLetter(6)
    fmt.Println(randStr) //0aW7cQ
}

RandSymbolChar

Generate a random symbol char of specified length.

Signature:

func RandSymbolChar(length int) string

Example:Run

package main

import (
    "fmt"
    "github.com/duke-git/lancet/v2/random"
)

func main() {
    randStr := random.RandSymbolChar(6)
    fmt.Println(randStr) // random string like: @#(_")
}

UUIdV4

Generate a random UUID of version 4 according to RFC 4122.

Signature:

func UUIdV4() (string, error)

Example:Run

package main

import (
    "fmt"
    "github.com/duke-git/lancet/v2/random"
)

func main() {
    uuid, err := random.UUIdV4()
    if err != nil {
        return
    }
    fmt.Println(uuid)
}

RandUniqueIntSlice

Generate a slice of random int of length n that do not repeat.

Signature:

func RandUniqueIntSlice(n, min, max int) []int

Example:Run

package main

import (
    "fmt"
    "github.com/duke-git/lancet/v2/random"
)

func main() {
    result := random.RandUniqueIntSlice(5, 0, 10)
    fmt.Println(result) //[0 4 7 1 5] (random)
}

RandFloat

Generate a random float64 number between [min, max) with specific precision.

Signature:

func RandFloat(min, max float64, precision int) float64

Example:Run

package main

import (
    "fmt"
    "github.com/duke-git/lancet/v2/random"
)

func main() {
    floatNumber := random.RandFloat(1.0, 5.0, 2)
    fmt.Println(floatNumber) //2.14 (random number)
}

RandFloats

Generate a slice of random float64 numbers of length n that do not repeat.

Signature:

func RandFloats(n int, min, max float64, precision int) []float64

Example:Run

package main

import (
    "fmt"
    "github.com/duke-git/lancet/v2/random"
)

func main() {
    floatNumbers := random.RandFloats(5, 1.0, 5.0, 2)
    fmt.Println(floatNumbers) //[3.42 3.99 1.3 2.38 4.23] (random)
}